Describe the bug (Required)
Client crashes when hovering over a spawner in the player inventory. It may be specific to wolf spawners.

To Reproduce (Required unless not known)
Steps to reproduce the behavior:

1. Silk touch a spawner and place it.
2. Apply an egg to it for type change -- in this case, wolf.
3. Pick up the spawner again and hover over it in your bags; client crashes.

Crash report (via. Hastebin)
Crash report

Expected behavior (Required)
Expected is the tooltip for the item would appear normally and no crash occur.

Versions:(check log if you don't know)

• Forge Version: 34.1.42
• MC Version: 1.16.3
• Mod Version: 1.5.34
• JEI Version (if present) : 7.6.0.51
• Baubles Version (if present) : N/A
• Curios Version (if present) : 4.0.2.0

i forgot this was a issue but it just happend with me when i try to hover over a enderman spawner i picked up using silk pick https://pastebin.com/HMNs2nVp

Hey may i ask where was the spawner item location in the inventory? A backpack?

it was in main inv not bacpack

for now i turned of picking up spawner with vannila tweeks and turned on picking up spawner with Apotheosis could be a mod conflict but that stoped the crashing

I have a test version in my discord can ya try it and check whether it doesnt crash?

sure one min

that worked it no longer says what kind of spawner it is but it did stop crashing

ok will release an official version thanks

Also can ya join my discord i will give ya a test version in #minecraft-mods channel with a fix but i am not it will work or work.
https://discord.gg/tqcqeSj

same crash happend on my pack and it was not a wolf spawner also was 1.16.4

https://pastebin.com/HNjmT5Cv

Was the mob renamed by any chance?

As far as I know, the mob was not renamed in our case.